Truthfully I think Steven IS Jacob Black. Think about it. To play Jacob the actor has to be able to hold his own up against Rob Pattinson as Edward Cullen. You need a man for the role not a boy, (btw I am Team Taylor but Steven IS Jake)
And Steven is a great actor, watch The Covenant for your proof. He looks great with whatever make up you throw at him, watch 10,000 BC for that, and he resembles Taylor somewhat so the switch won't be that bad like with Michael Copon. Speaking of Michael, he's 26 and 6'1 whereas Steven's 22 and 6'2. Come on now Summit just hire Steven already!!